Angered and broken-hearted by this, Letty uses the contents to her advantage.

The letter is a joke from Carvajal to Fernando teasing him about his bravery for seducing the ugly girl in order to protect the fate of Conceptos. Lety finds a letter written by Vice-President Omar Carvajal. Then Lety discovers the truth behind their love. Marcia and Omar eventually leave to Germany for a work trip, and during their leave Fernando and Lety are in their little world. Though Fernando has been with plenty of women, he has never felt so loved and cared for her, and he soon starts falling in love with Lety. Fernando feels like a disgrace because Lety is so good, and she gives herself to him, and he finds out that the only other love that Lety has felt before was also fake and due to a bet that some of the mean neighbors that she had. Lety is completely surprised over the attention and affection that Fernando gives her, and although she is scared to love him she can't help it. Fernando begrudgingly agrees, but he feels guilt over tricking the person who always has his best interest at heart, as well as disgust at the thought of having to seduce Lety. Omar convinces Fernando that he needs to make Lety fall in love with him so that Lety won't hand over the company to Tomas out of love. Fernando and Omar find out that Lety put Tomas in charge of finances of the false company, and then hear from her friends that she is in love with Tomas. However, in order to keep her crush on Fernando a secret from her friends, she claims that Tomas is her secret crush. Tomas is equally as ugly as she is, and they are like brother and sister. In order to keep up with the false company, Lety hires her best friend, Tomas Mora. Lety does as he asks, and this secret stays between her, Fernando, and the vice president, Omar Carvajal. Fernando, knowing this, asks that she help him create a false company to put Conceptos in debt as opposed to the banks. She is completely loyal to him and would do whatever he needed her to do. She becomes Fernando's right hand, and soon develops a crush on him even though he is a womanizer and engaged to Marcia Villaroel. After receiving the job from an uncertain president, Letty tries to prove herself with the help of The Club of the Uglies or The Ugly Club (El Club de las Feas). Though he is initially shocked at her appearance, he decides to hire her since she is obviously overqualified for the job.

The president of the company, Fernando Mendiola, however, calls her back. The story begins with her going to an interview at Conceptos, a famous Mexican modeling and advertising company, and being turned down for the job because of her appearance. Letty is the protagonist of La Fea Más Bella (The Most Beautiful Ugly Girl), and as the title suggests, she is not particularly good-looking. It is the second Mexican version of the popular Colombian telenovela Yo soy Betty, la fea (the first is Azteca Trece's El amor no es como lo pintan, aired in 2000). La Fea Más Bella ('The Most Beautiful Ugly Girl“) is a Mexican telenovela produced by Televisa. 'Tu belleza es un misterio' by Angélica Vale and Jaime Camil.'El club de las feas' by Banda El Recodo.

Yo soy betty la fea elenco